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General Mach Discussion / Re: When is a circle not a circle? When it's 4 arcs!
« on: April 22, 2014, 04:04:59 PM »
Success! I increased the acceleration to 1100 and now have much improved circles. There is still a wee bit of a flat area at one point which is 0.3mm smaller overall. I think I can live with that for the time being, with a bit more testing I will see if it is consistent. Now that I think about it I was getting the wobble when the 90deg corners were being cut in tiny radii so I might be able to increase the acceleration further.
Changed the e-stop pin to 11.
There is still a wee stutter in certain places which seems a bit strange. I was cutting large smooth arcs today and at the transition point where the arc is split there is a a slight hesitation and then it carries on. Is it seeing that there is a join in the arc and thinking about it? Is that a characteristic of stepper motors? The look ahead is set to 200 lines as recommended by mach handbook.
I realise that I may be barking up the wrong tree here but would a smooth stepper improve the performance?
Changed the e-stop pin to 11.
There is still a wee stutter in certain places which seems a bit strange. I was cutting large smooth arcs today and at the transition point where the arc is split there is a a slight hesitation and then it carries on. Is it seeing that there is a join in the arc and thinking about it? Is that a characteristic of stepper motors? The look ahead is set to 200 lines as recommended by mach handbook.
I realise that I may be barking up the wrong tree here but would a smooth stepper improve the performance?